Wrench



J. O. REYNOLDS.

WRENCH.

APPLICATION FILED FEB. 24, 1920.

Patented Mar. 29, 1921.

INVENTOR: zwmew PATENT OFFKIE.

JAMES O. REYNOLDS, OF EVANSVILLE, INDIAN A.

WRENCH.

Specification of Letters Patent. Patented 11 29 1921 Application filedFebruary 24, 1920. Serial is. 360,931.

To all whom it may concern:

Be it known that I, JAMES O. RnYNoLos, of Evansville, in the county ofVanderburgh and State of Indiana, a citizen of the United States, haveinvented a new and useful Improvement in Wrenches, 01": which the followin is a specification.

Fly invention relates especially to a pipe wrench, it is my object toprovide such improvement so as to distribute to the best advantagestrain put upon the wrench for preventing breakage, twisting or bendingof the operating parts and wear thereon.

My invention will be understood by reference to the drawings in which;

Figure 1, is a side view of a wrench havin my improvements.

ig. 2, is a longitudinal section through the working parts thereof,showing the manner in which the wrench is applied to a pipe or similardevice.

Fig. 3, is a perspective view of the stationary jaw, with the adjacentarms.

Fig. 4, is a perspective view of the housing, having a semicircle formopening to re ceive the adjacent arms, and comprising passa es separatedby a partition.

eferring to the drawings 5 represents the main shank of the wrenchprovided at one end with a suitable handle 6, at its opposite end with astationary jaw 16 and a pair of adjacent arms 12 of circular formationhaving arcs in excess of 180 degrees on their circumference. A housing 7is pivoted on adjacent arms 12 carrying a movable jaw 13, said movablejaw having a sliding shank 8 threaded in the usual manner to receive anadjusting nut 10.

The housing 7 has a semicircularly formed opening to receive theadjacent arms 12, and comprises passages separated by a partition, andof which passages 18 is that through which the main shank 5 extends, and19 the one through which the movable shank 8 extends.

The two finger grips, 11, of the housing, 7, are closed around theradius of the circular part of the adjacent arms sufiiciently to holdthe housing in place, but permitting a rocking movement of the housingon the adjacent arms.

Engaging the movable shank 8 and mounted within the housing 7 is anadjusting nut 10, the housing 7 has the usual side openings to permit ofthe nut 10 projecting beyond its sides, whereby the nut 10 may be turnedupon the threads 9 of the movable shank 8 to adjust its jaw 13 inrelation to the jaw 16 of the main shank 5.

In connection with the adjusting nut 10, it will be observed especiallyby reference to Fig. 2, that the axial line 21 of the movable shank 8,being central with adjacent arms center at 20, are both on the samecenter, whereas the screw shank 9, having an equal strain on the nut 10,regardless the position of adjustable jaw 13.

For limiting the rocking movement of the housing 7 on its adjacent arms12, the movable shank 8 will abut the main shank 5 in front of theadjacent arms 12, the housing abutting on the bottom part of thepassage, 18, of the housing, through which the main shank, 5, extends,abuttin on the main shank also assists in limiting the rocking movement.

The adjacent arms, 12, as shown in Fig. 3 are preferably made quitethick, as the strain and wear of the housing, 7, is the greatest at thisplace, resulting in very limited strain and wear on the finger grips,11, which hold the housing on the adjacent arms, 12.

The movable shank, 8, is snugly embraced between the adjacent arms, 12,which assists in the lateral support of the movable shank, 8, and tendsto eliminate twisting of the housing.

The wrench is shown in Fig. 1, preferably provided with the usualsprings 14 and 15, attached to the opposite sides of the main shank 5,and bearing against the opposite inner walls of the passage, 18, of thehousing he operation is as follows:

The normal position of the arts is substantially as shown in Fig. 1, ater the jaws have been brought into engagement with the work the ensuingpressure tends, as the jaws bite into the work, to draw the movable jawforward over the stationary jaw; at the same time the strain tends tothrow the movable jaw outwardly away from the stationary jaw, and todraw the movable shank out of the housing.

The draw upon the movable shank is transmitted to the nut, which drawsthe housing and the resulting tendency is to turn the housing upwardlyon its adjacent arms, which turning is determined or limited by themovable jaw abuting the main shank in front of the adjacent arms.

The adjacent arms act also to take up the side strain and twist ofmovable jaw a threaded shank provided with a jaw c0- shank. operatingwith the first named jaw, slidabie 10 What I claim as my mvention 1s;through said housing having its longitudi- In a pipe Wrench, thecombination with a nal axis passing through the center of the main shankhaving a suitable handle on one arc of said arms and an adjusting nutenend, of a stationary jaw, a pair of arms of gaging the threaded shankmounted in the circular formation having arcs in excess of housing.

180 degrees, a housing pivoted on said arms, JAMES O. REYNOLDS.

